Column-form.



J. Ez HGDGES.

COLUMN FORM.

APPucATIoN man 195C. as. 49:5.

mms-imm..

JESSE E, IIODGES,IGF COVINGTON, KENTUCKY.

COLUMN-FRM.

T all wiomlc't' 'may concern.'

,alined apertures 4a when the apertures or adjacent sheets are e Be it known that Jesse E. Honors, a citizen of the United resident of Covington, county ot Kenton,

tate of Kentucky, have invented certain new and useful Improvements in Column- Forms,zof which the following is a specification. i

This invention relates to improvements in column forms for molding concrete columns and hasfor an object to produce a sectional metal column form adapted to mold concrete columns of circular cross sectionl and of varying" height and diameter.

A further Iobject is to produce a sectional sheet ,metal column form and an improved means of reinforcing it.

These and other objects are attained in the form or mold described in the following specification, and. illustrated in the acconr panying drawings, in which:

Figure l is an elevational View of a mold embodying my invention.

-Fig- 2 is a sectional View taken on theline 2--2' of F ig. 1.

Fig. 3 is a fragment-al sectional View of the clamps for adjustably connecting the ends of the reinforcing bands, shown upon an enlarged scale.

Fig.` 4 is a. ragmental sectional view of a, joint between adjacent sheets.

The column form embodying myinvention comprises a series of sheets 4 joined together at intervals along their edges, the edges being brought together to circular formation with reinforcing bands 5 spaced 'apart along the lengthoi' the column. rihe sheets 4 from which the single main sheet which forms the body ot the mold, is constructed, preferably extend from top to hottom'of the column arid are of relatively naru row width. These-sheets are provided with along their edges so that brought together the corresponding apertures "of the sheets will register with one enother. In forming these apertures those in the inner edge 20 of each sheet, which .is contected by the concrete, are formed with an inclined Wall 21, the outside of the sheet being preferably provided with a slight anni l lerL flange 19. This ange is of such a size that it enters the plain aperture 22n in the outside effige 23 of each sheet. riirough these apertures fastening devices such as Spccication of Letters Patent.

Application led December 31, E915.

States of America, and.

engaging surfaces of the Patenten. apr. is, rare. Serial No. 69,613.

bolts 6 having countersunk heads which en gage the inclined walled aperture i, lare passed for the purpose of joining the sheets, the faces of the counter-sunk heads lying flush with the inside surfaces of the sheets.

The forni is constructed by joining the sheets at their longitudinal edges, the sheets having previously been curved to a normally curved formation of a radius equal to that of the largest column for which the mold is constructed, to forni a cylinder composed of the series of narrow sheets. ln order to reinforce the cylinder the reinforcing bands 5 are placed at intervals around it. These bands are adjustable circumterentially so 'as to reinforce the form for any diameter of column desired. These bands are preferably constructed of metal rod of circular cross\ j section adapted to embrace the curved sheetg` ends by and to be adjustably secured at their means of a clamping device 7. This device consists of a coupling S having ways 9 and 10 formed therein and crossing one another so that the ends ot' the rods may. cross and lie upon one another within the coupling 8.'

are formed, in which eccentric clamp dogs 13 and 14 are journaled, pins 15 and 16 be ing-provided for this purpose. The roddogs are eccentric to the pivotal points 15 and 16 and are adapted to engage the ends 17 and 18 of the rods so that the rods will be clamped in position against displacement when the eccentric surfaces are driven into engagement therewith.

in setting up the forni embodying my invention, the series of narrow sheets 4 from which the form is constructed, are joined tonv ether by means of the bolts 6, as shown in ,Y l. and 9.. lll/ith the cylindrical form thus constructed, the bands 5 are placed over the joined sheets, adjusted to the proper diameter, and spaced upon course in order tn prevent the slipping of the ends 1? and 18 of each band, from beneath the dogs 13 and 14, the eccentric surfaces of the dogs are 'driven into clamping engagement therewith after the bands to the proper diameter.

Should it be desired to increase the height of the column, short sections may be added y to the main section at its top edges, or two eo At the ends ci@ the coupling and extending from one` side thereof, journal lugs 11 and the sheets. 0f 100 adjusting [05 r sheets secured together adjacent to their tclescoped with one another until the proper length of mold has been constructed, as shown in Fig. 1.

By previously bending the sheets to a radius equal to that of the largest column ydiameter of which the mold is capable, the

sheets are prevented from buckling'during the setting up operations and are also given an initial bend so as to facilitate their further ben'ding when constructing a mold of small diameter. rJihe circiunferentially alined apertures of each series aid greatly in the proper adjustment of the form to Having thus describedmy invention, what I 'claim is:

LA column form compi-15mg a sei-les of edges to form a concrete receiving mold of desired contour, a series. of reinforcing bands embracing the mold, and clamps adapted to retain the bands in adjusted positions, said clamps comprising a couplingheving intersecting ways adapted to receive the ends ofl the reinforcing band, and an eccentric clamp dog adapted to be driven into engagement. with the ends of the band to. retain the band in its adjusted position, for any size of mold formed by the assembled sheets.

2. A column form comprising a series of sheets having a series of alined perforations in their edges, means engaging registering 4C' perforations of adjacent sheets for securing the sheets together to form a concrete receiving mold, a series of reinforcing bands embracing the mold,`and clamps engaging the ends of the bands and adapted to retain the bands in adjusted positions upon the mold,u said clamps consisting of a couplinghaving transverse intersecting Ways adapted to receive the ends of the bands in superinrI posed relation With one another, and clamp dogs having eccentric 'surfaces pivotally mounted on the coupling adapted to be driven into clamping enga ement-'with the j. ends of the bands to retain t e bands against` displacement from their adjusted positionsQ."

Intestimony whereof, I have hereunto subscribed my name .this 24th dayof De- EDW. 0. KEA'roR, WALTER F. MURRAY.. 

